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Financial Risk Management - Summary of Variable Interest Rates to the Company is Exposed had been 100 Basis Points (Higher) or Lower Than the Interest Rate (Detail) - MXN ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Disclosure Of Financial Liabilities Variable Rate [Abstract]      
Effect in case of interest rate increase in 100 basis points, Variable rate long term debt $ (111,492) $ (84,251) $ (121,747)
Effect in case of interest rate decrease in 100 basis points, Variable rate long term debt $ 111,492 $ 84,251 $ 121,747